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JOHN R. THOMAS, OF MIFFLINTOWN, PENNS LV NIA. Letters Patent No. 68,670, dated September 10, 18671 i V IMPROVEMENT IN'oonN-PLoUcns.

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TO ALL WHOM IT-MAY CONCERN: 1

Be it' knownthat I, JOI IN R. THOMAS, of Mifilintown, in the county of Juniata, and 'State of Pennsylvania, have invented a new and useful Improvement in Co'rn-Ploughs; and I do hereby declare thefollowing to be a full, clear, and exact'description of the same, reference being bad to the accompanying drawings, foruiing part of this specification, andi'n which-' V r Figure 1 is a'top view of my invention,

Figure 2 is a side elevation of the same.

Similar letters of-referen ee indicate corresponding parts in the two figures.

In this invention the plough canfbe adjusted so as to throw the dirt in rows or not, atpleasurea The shape of the plough-point and the means of attaching and regulating the pitch of the ploughs are also improved.

Inorder that others skilled in the art to'which my invention appertains may be en abled to makennd use the same, I will proceed todese'ribe it in detail. v p

In the drawings, A represents the draw-beam and centre beam, B B the side beams, and C the rear orcrossbeam of my plough, the whole forming an equilateral triangular frame, the di-aw-beam projecting from its verti cala-ngle. D D are plough-standards, hinged to the outside of the side beams B, upon 'bolts. dd are the plough-points attached -to-. the standards D D. In the standards D D is a slot, d", throughwhi'ch-passes a gaugehar, E, hinged to .the side'beamsat e, and provided with a series of small holes, e e c, in which wooden Ipins may be inserted to hold the ploughs in position. F F are braces ofmetal, hinged or pivoted on the same bolt e that holds the upper end'of, the gauge-bars E, and having at their rear end holes to permit the passage ofthe bolts G G, which serve as pivots for the standardsD D'. Washers H are provided to operate either between the standards and braces, or'between the standards and side beams, as may bedesired. The boltsG- Gen which 'rests the plough-standard pass somewhat loosely through the holes in the rear end of the braces F F, andhare holes, z 1;, provided for their reception, in the side beams B B, two or more holes at difiercnt angles'for each bolt. These holes 2' z" are bored at such angles that one of them-,"i, is perpendicular to the side beam B, while the other, a", is perpendicular to the eentre beam A. It, therefore, the bolts G are passed through the holes 2'', theploughs will work at right angles to the centre beam A, and throw. the dirt in the usual furrow; but if the bolts are passed through the other holes i, theploughs will work atright angles to the side beamsB B, and having their faces inclined inward towards each other, will throw the dirt inward and heap it up in rows. The form of plough-point whichI use is delineated, in the drawings, and is that of a spade, but has no concavity of the forward face, that being a simple plane surface. Its lower edge is rounded.- The pin is which holds -the ploughs in place is made of wood, so that when theplough comes in contact with any obstruction the pin breaks before any injury resultsvto the' ploug-hs or standards. When the pin It breaks, the ploughs, being hinged as described tothe outside of the side beams B B, turn back at pleasure. They may be made so as to be turned baek'purallel with the side beams, if that is desired, an object which cannot be attained where the standards are pivoted in slots-in the side beams. The. standard'of the forward plough is hinged to cars a reattached to the centre beam A, so as to admit of the same backward motion in case of'meeting an obstacle. The washers RH have one side plane and one conv'ex,for' the purpose of better adjusting the standards at their different angles with the side beams and braces. Where the plough works at right angles to the side beams, the washer is to be placed between the standard and brace. Where it works at right angles with theccntro'beamandf thus necessarily at oblique angles with the side beams, the washers are to be placed between the standards and side beams. 5 l

Having thus described n'yv inventiomwhat I claim as new, and desire tosecurc by Letters Patent, is-

1'. The plough-points d'd, having the form above described, substantially as and for the purpose specified.

2. The method of adjusting the direction of the ,ploughs above described, bymeans of the bolts G G, the braces F F, and the holes is, passing in dificrent directions through the 'side beams B 13, substantially as and for the purpgse described. p l i 3. The washers H H, suhstantiallyas and for the purpose specified.

, JOHNB. THOMAS. Witnesses Juo. M. SAHUR, Jnnnman Lrons. 

